http://www.premierguitar.com/articles/Fighting_the_Humidity_Battle

http://www.pjguitar.com/articles/humidity-guitars-health/

http://www.fretnotguitarrepair.com/repair/acoustic-guitar/intonation.php

www.frets.com

http://www.robchapman.tv/forum/threads/how-to-fix-chips-in-a-guitar-finish.17454/

http://grahamparkerluthier.com/category/vintage-acoustic-guitar-repair/

http://www.liutaiomottola.com/formulae/fret.htm

http://www.buildyourguitar.com/resources/tips/fretdist.htm

https://www.youtube.com/watch?v=_lp-KclqVgQ

https://www.youtube.com/watch?v=YJTQLLnscgg

Canh độ cong cần. hở 0.013" hoặc 0.026":

http://www.frets.com/FretsPages/Musician/GenSetup/TrussRods/TrussRodAdj/tradj.html